EP0558414A1 - Scheibenwischeranlage - Google Patents

Scheibenwischeranlage Download PDF

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Publication number
EP0558414A1
EP0558414A1 EP93400482A EP93400482A EP0558414A1 EP 0558414 A1 EP0558414 A1 EP 0558414A1 EP 93400482 A EP93400482 A EP 93400482A EP 93400482 A EP93400482 A EP 93400482A EP 0558414 A1 EP0558414 A1 EP 0558414A1
Authority
EP
European Patent Office
Prior art keywords
torque
wiper
wiper device
axis
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93400482A
Other languages
English (en)
French (fr)
Other versions
EP0558414B1 (de
Inventor
Maurice Journée
Jean-Pierre Jehannet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Journee SA
Original Assignee
Paul Journee SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Paul Journee SA filed Critical Paul Journee SA
Publication of EP0558414A1 publication Critical patent/EP0558414A1/de
Application granted granted Critical
Publication of EP0558414B1 publication Critical patent/EP0558414B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3411—Wiper arms; Mountings therefor with means for varying wiper-blade pressure on windshield during operation

Definitions

  • the present invention relates to a wiper device, in particular for a motor vehicle.
  • the invention relates more particularly to a wiper device of the type comprising at least one wiper blade, for example by means of a brush holder with stirrups and which is mounted articulated, around an axis d hinge on a wiper drive head which is subjected to an alternating rotational movement by a wiper shaft and which makes it possible to obtain a sweeping of the window to be wiped.
  • the wiper arm carries, via the brush holder, an articulated wiper blade which is able to wipe the glass surface such as for example a windshield of a motor vehicle.
  • At least one spring such as for example a helical tension spring, which is disposed between the drive head and the rest of the wiper arm and which in fact applies a nominal torque. substantially constant wiping on the wiper arm, about its axis of articulation, so as to press the wiping blade against the window.
  • the blade is pressed during the sweeping movement of the glass surface, but also in the rest position of the wiper device.
  • the quality of wiping of the glazed surface depends in operation on the control of the wiping force which is applied to the blade, and this in particular as a function of the speed of movement of the vehicle and as a function of the frequency of the wiper sweeping movement.
  • a wiper device of the type mentioned previously has already been proposed in which the means arranged between the drive head and the wiper arm for applying to the latter a wiping torque comprise at least one spring which applies to the wiper arm a substantially constant nominal wiping torque, and a device for applying to the wiper arm a complementary torque whose algebraic value is adjustable so that the value of the wiping torque can be increased or reduced depending in particular on a vehicle operating parameter.
  • the device for applying the additional torque comprises, for example, an actuator associated with the drive head and an actuator output rod connected to the wiper arm.
  • the invention provides a wiper device of the type mentioned above in which the actuator output member is connected to the wiper arm by a connecting piece, characterized in that the connecting piece comprises an active surface which cooperates with a member for transmitting the additional torque connected to the wiper arm and which is capable of moving relative to the latter against an elastic force of taring.
  • the wiper device 10 illustrated in Figures 1 and 2 comprises a wiper arm 12 forming a brush holder, the portion illustrated in the figures is in the form of a hollow inverted U-shaped section consisting of a back 14 and by two perpendicular side panels or cheeks 16 and 18.
  • the wiper arm 12 is articulated on a drive head 20 about a geometric axis X-X which extends in a direction perpendicular to the general longitudinal direction of the wiper arm 12.
  • the drive head 20 has, at its end opposite the hinge axis XX, a bore 22 of axis YY substantially perpendicular to the hinge axis and which is designed to receive a wiping shaft (not shown) which rotates the drive head 20 in an alternating motion by any means such as a wiping motor (not shown).
  • the wiper device 10 comprises means 24 which make it possible to apply to the arm 12 a wiping force or pressure P of substantially constant value and oriented in the direction of the surface to be wiped (not shown).
  • the device 24 is here constituted by a helical tension spring 26, one end 28 of which is hooked on a transverse rod 30 of the drive head 20 and the other end of which is hooked on a transverse rod 34 of the wiper arm -ice.
  • the axis ZZ of the rod 34 is located below the axis XX, that is to say between the latter and the surface to be wiped so that the spring 26 applies a nominal torque to the brush 12 around its hinge pin XX from which a wiping pressure P applied to the wiping blade results.
  • the wiper device 10 also comprises means for applying to the wiper arm 12 an additional torque which makes it possible to vary the value of the wiping pressure P.
  • These means are essentially constituted by an actuator 36 arranged in the drive head 20 and by a connecting piece 38, shown diagrammatically in FIG. 1, which connects the output rod 40 of the actuator 36 to the arm of wiper 12.
  • the actuator 36 is of the linear type and its general direction of actuation A is perpendicular to the axis of articulation X-X of the arm 12 on the drive head 20.
  • the rod 40 of the actuator 36 projects parallel to the direction A, outside the body 42 of the actuator 36.
  • the connecting piece 38 cooperates with a member 44 for transmitting the additional torque to the wiper arm 12.
  • the member 44 is made in the form of a rocker which is pivotally mounted relative to the arm wiper 12 by means of a pivot axis 46 whose geometric axis of rotation UU is parallel to the axis of articulation XX.
  • the member 44 is pivotally mounted on the axis 46 by means of its central branch 48 which is connected to a first branch for applying the torque 50 and to a second branch for applying the torque 52.
  • the branches 50 and 52 extend substantially parallel to each other and in a direction substantially perpendicular to the direction A of movement of the connecting piece 38.
  • the two application branches of the torque are connected to the central branch 48 by a connecting branch 54 which extends in a direction substantially parallel to the back 14 of the wiper arm 12.
  • a longitudinal blind hole 56 is formed in the first branch of application of the torque 50 and it receives a helical compression spring 58 whose first end 60 bears against the bottom 62 of the blind hole 56 and whose opposite end 64 urges the internal face 66 of the back 14 of the wiper arm 12 with the interposition of a support cup 68.
  • the spring 58 is a helical compression spring which biases the rocker 44 in rotation about its axis U-U in a clockwise direction when considering FIG. 2.
  • the torque transmission rocker 44 In its neutral position illustrated in FIG. 2, the torque transmission rocker 44 is biased by the spring 58, in abutment against the internal face 66 of the back 14 against which the upper face 70 of the portion of the branch of the link 54 which connects the branches 48 and 52.
  • the free end 72 of the first application branch of the torque 50 is arranged opposite a first active surface 74 of the connecting piece 38.
  • the active surface 74 is a portion of the surface plane which extends in a plane perpendicular to the direction A of movement of the connecting piece 38.
  • the free end 72 can for example be equipped with a roller 76 which is mounted to rotate about an axis of rotation V-V parallel to the pivot axis U-U.
  • the connecting piece 38 is guided in its movements in the direction A by a guide finger 78 connected to the drive head 20 which is received in a longitudinal guide lumen 80 of the piece 38.
  • the cooperation of the free end 72 of the first branch 50 with the first active surface 74 aims to enable the wiper arm 12 to be applied a complementary torque which increases the wiping pressure P.
  • the actuator 36 causes the connection piece 38 to move in the direction A1 as indicated in FIG. 3 to bring the active surface 74 into contact with the free end 72.
  • the calibration spring 58 is chosen so that its elastic constant applies to the rocker 44 a resisting torque of a predetermined value which urges it clockwise, considering FIG. 3, around the axis U-U.
  • the value of the elastic constant of the spring 58 is therefore chosen so that the resistive torque is slightly greater than the engine torque which is applied to the rocker 44 by the connection surface 74 and that, thus, the connection piece 38 allows apply additional torque to the wiper arm 12 which increases the wiping pressure P.
  • the action of the active surface 74 on the free end 72 of the arm 50 ensures the transmission to the wiper arm 12 of a complementary torque around the axis XX which increases the wiping pressure P.
  • any movement of the wiper arm 12 around the axis XX which normally results in an increase in the additional torque exceeding the value resulting from the choice of the value of calibration of the spring 58, results in a pivoting of the rocker 44 around its axis UU counterclockwise by considering FIG. 2 and as illustrated in FIG. 4.
  • the calibration spring 58 is compressed inside the blind hole 56 and the point of contact between the surface of the end 72 and the first active surface 74 moves upwards by considering Figures 3 and 4 .
  • the bottom 62 of the blind hole 56 is pierced with a tapped hole 82 which receives an adjustment screw 84 whose end face 86 acts on the first end 60 of the spring 58 via a disc support 88.
  • a recess 92 is provided in the connecting piece 38.
  • the connecting piece 38 has a second active surface 94, arranged in the vicinity of its free end, which is designed to cooperate with the free end 96 of the second branch 52 for applying the torque.
  • the second active surface 94 is a ramp inclined relative to the direction A of movement of the part 38.
  • the ramp 94 is constituted by a first branch 98 of a leaf spring 100 in the form of a hairpin.
  • the second branch 102 of the spring 100 bears against a flat surface portion 104 of the connecting piece.
  • the elbow 106 which connects the branches 98 and 102 together is crossed by a pin 108 which allows the spring 100 to pivot about the axis S-S of the pin 108.
  • An adjustment screw 110 is mounted screwed into a tapped hole 112 of the connecting piece so that its end face 114 can cooperate with the face opposite the second branch 102 of the spring 100 to adjust the position angularity of the spring 100 around the axis SS and thus modify the inclination of the ramp 94.
  • the active surface formed by the ramp 94 comprises a notch 116 in the vicinity of the free end of the branch 98 of the spring 100.
  • the cooperation of the second active surface 94 with the free end 96 of the second branch 52 application of the torque aims to apply to the arm 12 a complementary torque opposite to that which is applied to it by the spring 26 in order to reduce the wiping pressure P.
  • the actuator 36 causes the connection piece 38 to move in the direction A2 (see FIGS. 6 and 7) until the free end 96 cooperates with the ramp 94.
  • the notch 116 formed in the ramp 94 determines the parking position of the wiper arm 12 in which the free end 96 is received in the notch 116 and applies to the arm 12 a maximum relief torque.
  • the calibration spring 58 extends axially in the blind hole 56 around the rod 120 of a piston mounted to slide in the hole 56 and the piston head 122 of which receives a roller 124 which is mounted rotating around an axis WW parallel to the pivot axis UU and perpendicular to the axis of the piston.
  • the rotating roller 124 cooperates with a support pad 126 formed on the internal face 66 of the back 14 of the arm 12.
  • the free end 96 of the second branch 52 for applying the torque comprises an inclined ramp 128 which is extended by a counter ramp 130.
  • the second active surface of the connecting piece 38 is here constituted by the external cylindrical surface 94 of a roller 132 which is mounted rotating about an axis of rotation T-T perpendicular to the direction A of movement of the connecting piece 38.
  • the roller 132 is mounted in the head 134 of a piston, the rod 136 of which extends coaxially inside a blind bore 138 formed in the connecting piece 38, in the vicinity of the free end 140 of the latter. .
  • a helical compression spring 142 is mounted in the blind bore 138.
  • first end 144 is supported in the bottom of the bore while its second end 146 biases the piston 134 and the roller 132 axially upward when considering the figures.
  • the device is illustrated in FIG. 8 in its neutral position corresponding to FIG. 2.
  • the connecting piece 38 is driven by the actuator 36 to the right by considering FIG. 8 until reaching the position illustrated in FIG. 9 in which the roller 76 cooperates with the first active surface 74.
  • Figures 10 and 11 are views similar to those of Figures 8 and 9 corresponding to a different site of the wiper relative to the windshield, that is to say in a position in which the curve of the windscreen -brise is different.
  • the roller 76 of the rocker remains distant from the active surface 74 of the connecting piece 38.
  • FIG. 11 which corresponds to the application of a complementary torque to the arm 12 by the connecting piece 38, it can be seen that, as in the case of FIG. 4, the rocker 44 has pivoted around its axis UU, counterclockwise by considering the figures, against the calibration force applied to it by the spring 58.
  • FIG. 12 illustrates the so-called parking position in which the actuator 36 has caused the connection piece 38 to move to the left by considering the figures, the second active surface 94 formed by the roller 132 having, by cooperation with the portions of ramps 128 and 130, caused the windscreen wiper arm 12 to pivot about its articulation axis XX clockwise by considering the figures so as to cause relief, that is to say a reduction in the wiping pressure P.
  • the device is illustrated in FIG. 13 in its so-called intervention position in which the user has caused the wiper arm 12 and the rocker 44 which is linked to it to pivot fully, about the axis XX so as to example of replacing the wiper blade.
  • FIGS. 14 and 15 show an alternative embodiment of the embodiment illustrated in FIGS. 9 and 11.
  • the branch 50 for applying the torque to the rocker 44 is equipped with an arm 150, one end 152 of which is articulated on the branch 50 around a pivot axis S-S.
  • the arm 150 is made in the form of a hollow cylindrical rod 154 inside which is slidably mounted the rod 156 of a piston whose head 158 comprises a spherical boss 160 which is received in a complementary housing 162 formed in the internal face of the back 14 of the wiper arm 12.
  • the calibration helical spring 58 is interposed between a radial support shoulder 164 of the arm 150 and the head 158 of the piston.
  • the calibration springs have the sole function of determining on the one hand limit values of the additional torque applied by means of the actuator 36 and on the other hand ensuring the return of the rocker 44 in its neutral position, but that they exercise no function of applying additional torque to the arm 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Pivots And Pivotal Connections (AREA)
EP93400482A 1992-02-28 1993-02-25 Scheibenwischeranlage Expired - Lifetime EP0558414B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202337A FR2687968B1 (fr) 1992-02-28 1992-02-28 Dispositif d'essuie-glace.
FR9202337 1992-02-28

Publications (2)

Publication Number Publication Date
EP0558414A1 true EP0558414A1 (de) 1993-09-01
EP0558414B1 EP0558414B1 (de) 1996-05-01

Family

ID=9427140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400482A Expired - Lifetime EP0558414B1 (de) 1992-02-28 1993-02-25 Scheibenwischeranlage

Country Status (6)

Country Link
US (1) US5339489A (de)
EP (1) EP0558414B1 (de)
JP (1) JPH06234351A (de)
DE (1) DE69302423T2 (de)
ES (1) ES2086892T3 (de)
FR (1) FR2687968B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954147A1 (de) 1999-11-11 2001-05-31 Volkswagen Ag Scheibenwischer
GB2387049A (en) * 2000-11-27 2003-10-01 Seagate Technology Llc Motor start-up current control apparatus and method
JP7115412B2 (ja) * 2019-04-26 2022-08-09 株式会社デンソー ワイパ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1938618A1 (de) * 1969-07-30 1971-02-11 Heinrich Ernst Vorrichtung zum Erhoehen oder Absenken des durch eine Federkraft verursachten Anpressdruckes eines Scheibenwischers
GB2180442A (en) * 1985-09-06 1987-04-01 Nissan Motor Windscreen wiper with device for adjusting pressure of wiper blade on windscreen
DE4032655A1 (de) * 1989-10-16 1991-04-18 Mitsuba Electric Mfg Co Mit variablem druck arbeitendes scheibenwischersystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61125952A (ja) * 1984-11-21 1986-06-13 Nissan Motor Co Ltd 自動車用ワイパ
JPS62122852A (ja) * 1985-11-22 1987-06-04 Nippon Denso Co Ltd ワイパ装置
JPS62134355A (ja) * 1985-12-09 1987-06-17 Ichikoh Ind Ltd 押圧力の調整可能なワイパ装置
JP2758453B2 (ja) * 1989-09-08 1998-05-28 アイシン精機株式会社 アーム圧可変ワイパ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1938618A1 (de) * 1969-07-30 1971-02-11 Heinrich Ernst Vorrichtung zum Erhoehen oder Absenken des durch eine Federkraft verursachten Anpressdruckes eines Scheibenwischers
GB2180442A (en) * 1985-09-06 1987-04-01 Nissan Motor Windscreen wiper with device for adjusting pressure of wiper blade on windscreen
DE4032655A1 (de) * 1989-10-16 1991-04-18 Mitsuba Electric Mfg Co Mit variablem druck arbeitendes scheibenwischersystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 315 (M-529)(2371) 25 Octobre 1986 & JP-A-61 125 952 ( NISSAN MOTOR ) 13 Juin 1986 *

Also Published As

Publication number Publication date
EP0558414B1 (de) 1996-05-01
JPH06234351A (ja) 1994-08-23
DE69302423T2 (de) 1996-08-14
US5339489A (en) 1994-08-23
FR2687968A1 (fr) 1993-09-03
FR2687968B1 (fr) 1994-04-15
ES2086892T3 (es) 1996-07-01
DE69302423D1 (de) 1996-06-05

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